WO2004033827A2 - Safety lock for lever-type door handles - Google Patents
Safety lock for lever-type door handles Download PDFInfo
- Publication number
- WO2004033827A2 WO2004033827A2 PCT/US2003/031608 US0331608W WO2004033827A2 WO 2004033827 A2 WO2004033827 A2 WO 2004033827A2 US 0331608 W US0331608 W US 0331608W WO 2004033827 A2 WO2004033827 A2 WO 2004033827A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- safety lock
- lever
- child safety
- collar
- door
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/0014—Locks or fastenings for special use to prevent opening by children
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
- E05C19/18—Portable devices specially adapted for securing wings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S292/00—Closure fasteners
- Y10S292/65—Emergency or safety
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/03—Miscellaneous
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/34—Portable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/57—Operators with knobs or handles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/40—Portable
Definitions
- the present invention relates to mechanisms for securing doors from being opened by small children, and in particular, to a device suitable for doors with lever- type door handles.
- Architectural doors may have a latch mechanism holding the door closed and operated by means of a doorknob.
- the latch mechanism may be without a lock, and therefore readily opened by anyone turning the doorknob.
- Parents with small children who wish to secure a door may make use of an add-on "safety lock” that prevents the child from opening the door.
- a commonly available safety lock for standard doorknobs covers the doorknob with a loosely fitting shell which rotates freely around the doorknob. A child grasping the shell can turn only the shell and not the contained knob. An adult with greater hand strength may compress the shell against the doorknob so as to enable rotation of the doorknob through the shell.
- This type of safety lock differentiates between adults and children in part by hand strength and requires that the doorknob be rotationally symmetric.
- lever handles which can be easier for the infirm and handicapped to actuate.
- a safety lock using a rotating shell design does not work with such lever handle systems, which are not rotationally symmetric, and have a wide variety of lever sizes.
- lever handles may in some cases be easier for small children to open, to the extent that the child may be drawn to reach up and hang upon the lever.
- the present invention provides a safety lock for lever-type door handles that blocks rotation of the handle by bracing the handle against both the handle shaft and at least one stationary point on the door structure, typically the door jam. In this way, the lever need not be fully shrouded and a wide variety of different door handles may be accommodated.
- the present invention provides a child safety lock for doors with lever handles of a type having a rotatable shaft extending from the door and a lever extending radially from the handle shaft.
- the child safety lock comprises a lever grip engaging a portion of the lever and a fulcrum element attached to the lever grip to be positioned proximate to the shaft as a fulcrum.
- At least one arm having a first end attached to the fulcrum element extends radially therefrom to a second end sized to interfit with a stationary door structure.
- a force of rotation of the lever in an unlocking direction may be conducted by the lever grip through the fulcrum element to the shaft, and through the arm to the stationary door structure.
- the arm may be sized so that the second end interfits with a door jam adjacent to the door handle when the door is closed.
- the fulcrum element may be a collar surrounding the shaft.
- the collar may include at least a first and second collar portion separable for insertion of the shaft within the collar.
- the collar may include at least one latch for releasably retaining the collar in a closed position around the shaft after the shaft is inserted into the collar.
- the collar may include space-filling elements allowing the inner opening of the collar to conform to shafts of different diameters.
- the space filling elements may be spring fingers extending inward from an inner edge of the collar to flexibly press against the outer circumference of the shaft.
- the arm may include a release allowing it to be displaced from interfitting with the stationary door structure for rotation of the lever.
- the arm may include a pivot operating about an axis substantially parallel to the axis of the shaft and the release may be a catch preventing pivoting of the arm except when the catch is released.
- I is thus another object of the invention to provide a release mechanism that is simple and does not produce unwieldy extensions from the door.
- the lever grip may be a collar surrounding the lever. It is thus another object of the invention to provide a positive retention of the lever and a gripping of levers of arbitrary length in a single device.
- the safety lock may include a second arm extending radially from the fulcrum to a second end sized to interfit with a stationary door structure.
- the lever grip fulcrum element and arm may be polymer materials.
- the release mechanism may be oriented on top of the safety lock when the safety lock is in place and locked on a door handle.
- the arms may have feet portions that ride against the front surface of the door.
- I i- 3 another object of the invention to provide a lock that rests stably on the door when attached to the door handle.
- Fig- 1 is a an exploded perspective view of the three components of the safety lock of a preferred embodiment of the invention partially assembled around a lever door handle shown in phantom;
- Fig* 2 is a fragmentary cross-sectional, front elevational view through the assembled invention along lines 2-2 of Fig. 1 showing attachment of two collar portions about the shaft of the handle and the compression of space filling elements therein;
- Fig- 3 is a right side, elevational view of a lever grip attached to one of the collar portions for receiving the lever in a cage to retain the lever, the figure further showing the offset of the cage with respect to the collar;
- Fig* ⁇ a is a fragmentary right side, elevational view of a collar tab for holding the collar portions together;
- Fig* ⁇ b is a cross-sectional view through the collar tab along lines 4b— 4b showing a stop blocking the disengagement of barbed fingers;
- Fig- 5 is a front elevational view of the assembled components of Fig. 1 showing blocking of the handle of a door against clockwise rotation by a first arm abutting a door jam;
- Fig- 6 is a cross sectional view along lines 6—6 of Fig. 1 showing a release allowing a folding back of a second arm of Fig. 7;
- Fig- 7 is a fragmentary view similar to that of Fig. 5 showing a folding back of a second arm allowing lifting of the lever.
- a lever-type door handle 10 includes an escutcheon plate 12 fitting against a front surface of the door 14.
- a shaft 16 may extend from the door 14 along a shaft axis 18 about which the shaft 16 may turn.
- a lever 20 extends radially from the exposed end of the shaft 16 to be grasped by the user to rotate the shaft 16 to operate a latch mechanism within the door (not shown) as is generally understood in the art.
- a safety lock 22 per the present invention provides a first collar portion 24 having a hemicylindrical opening 26 for fitting about a left side of the shaft 16 as depicted and a second collar portion 28 having a hemicylindrical opening 30 for fitting about a right side of the shaft 16, together providing a cylindrical bore through which shaft 16 may pass.
- space filling elements 36 may extend inward from the inner surfaces of the hemicylindrical cavities of first collar portion 24 and second collar portion 28; the space filling elements 36 being flexible fingers diverging from a line of diameter of the formed cylindrical bore in a V-form opening toward the center of the cylindrical bore.
- the fingers may flex outward to fill the space between the outer circumference of the shaft 16 and the inner surface of the formed cylindrical bore preventing looseness in the interfitting of the first collar portion 24 and second collar portion 28 about the shaft 16 such as would cause a rattling or inadvertent pivoting thereabout.
- the second collar portion 28 may be held to first collar portion 24 by barbed fingers 32 extending horizontally from the first collar portion 24 and passing through retaining slots 48 on collar tabs 34 on second collar portion 28.
- the barbed fingers 32 may flex inward to allow their outwardly extending barbs 50 to pass through the slots 48 in the collar tabs 34 and engage the outer surface thereof. Further engaging motion of the barbed fingers 32 and collar tabs 34 is stopped by molded stop 52 projecting upward from first collar portion 24 between the barbed fingers 32.
- Outward flexure of the barbed fingers 32 is sufficient to hold collar tabs 34 of second collar portion 28 in place, however, additional security is provided by means of stop plates 56 attached by living hinges 58 to an outer edge of the collar tabs 34.
- the stop plates 56 fit between tips of the barbed fingers 32 after they have passed through the collar tabs 34 preventing them from flexing inward such as might disengage their barbs 50 from the surface of the collar tabs.
- a T-retainer 59 extends outward from the collar tabs 34 to be received in a dual width slot 60 in the stop plate 56.
- One portion of the dual width slot 60 allows free passage of the head of the T-retainer 59 through the dual width slot 60 while the other portion of the dual width slot 60 is sufficiently narrow to block passage of the head of the T-retainer 59 thereby capturing the stop plate 56 beneath the head of the T-retainer 59.
- a handle 62 projects outward from the stop plate 56 to allow engagement and disengagement of the stop plate 56 from the T-retainer 59.
- first collar portion 24 and second collar portion 28 may be thus easily assembled and disassembled about the shaft 16 without needing to thread the collar so formed over lever 20.
- the second collar portion 28 includes a cage 40 defining an opening 42 through which the lever 20 may pass to be surrounded on all sides.
- This opening 42 may also have space filling elements (not shown) allowing the cage 40 to conform to handle levers 20 of different widths and thicknesses or a single opening size may be used, as shown, allowing some limited and acceptable handle rotation.
- the opening 42 of the cage 40 is offset outward from the door 14 with respect to the second collar portion 28 around the shaft 16. This offset is reversed for the lever on the opposite side of the door and yet both lever directions may be accommodated by a 180-degree rotation 46 of the second collar portion 28 about a radial axis 44, prior to its engagement with first collar portion 24 as shown in Fig. 1.
- the barbed fingers 32 of the first collar portion 24 and the slots 48 of the collar tabs 34 of the second collar portion 28 are symmetric so as to allow this rotation 46 while still permitting the connection between the barbed fingers 32 and the slots 48. In this way, lever handles on either side of the door 14 may be secured with the present device.
- FIG. 1 and 5 attached to the first collar portion 24 are an upper arm 68 and lower arm 64, each extending radially from the shaft 16 at approximately equal angular spacing about axis 18 to each other as to the lever 20.
- the arm 64 is sized so that downward motion (clockwise) of the lever 20, acting through the cage 40 against a fulcrum provided by the first and/or second collar portions 24 and 28, brings the distal end of arm 64 upward into abutment with the vertical jam wall 66 being part of the casing of door structure.
- arms 64 and 68 are sized so that the free rotation of the lever 20 is insufficient to cause the lock mechanism with the door 14 to withdraw the bolt (not shown) holding the door shut.
- the arms 64 and 68 include at their distal ends, spreaders 67 extending axially that provide an edge that may ride along the face of the door 14 to stabilize the safety lock and ensure engagement with the jam.
- arms 64 and 68 together prevent the opening of the door 14 by moving the lever 20 up or down. This is the highest level of security.
- the arm 64 alone may, however, prevent the opening of the closed door 14 where the expectation is that the child will only be able to pull downward on the lever 20. In this case, a parent or guardian may simply raise the lever 20 to open the door 14. [0057] An opening of the door 14 or this lower level of security maybe obtained by a retraction of lever arm 68 through the use of a release lever 70. Referring to Figs.
- this retraction of arm 68 is accomplished by attaching arm 68 to first collar portion 24 by means of pivot pins 72 extending axially from the first collar portion and fitting within corresponding pivot holes 74 in the proximal end of arm 68 so that arm 68 may swing about an axis generally parallel to axis 18 while remaining adjacent to the plane of the door 14.
- Unintended retraction of the arm 68 when the lever 20 is to be locked against upward motion is provided by means of a flexible hook 76 extending within the arm 68 from its distal to proximal end. The hook engaging a catch surface 78 attached to the first collar portion 24 between the pivot pins 72 to which the arm 68 is attached.
- the hook 76 when engaged, resists upward motion 80 of the arm 68 until the hook 76 is disengaged from the catch surface 78 by a backward pressing of the release lever 70 as indicated by arrow 82.
- he above-described design is amenable to injection molding where each of the arm 68, the first collar portion 24 and the second collar portion 28 are separately molded as integral parts and assembled, the first collar portion 24 and second collar portion 28 assembled together via the barbed fingers 32 as described above, and the arm 68 assembled to the first collar portion 24 by snapping it onto the pivot pins 72.
- Fabricating the safety lock of the present invention from plastic material such as polypropylene provides for good resilience and low risk of marring the door 14 and the flexibility required of the space filling elements 36, living hinge 58, and flexible latch hook 76.
Landscapes
- Lock And Its Accessories (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003282698A AU2003282698A1 (en) | 2002-10-07 | 2003-10-06 | Safety lock for lever-type door handles |
US10/530,635 US7416230B2 (en) | 2002-10-07 | 2003-10-06 | Safety lock for lever-type door handles |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41668402P | 2002-10-07 | 2002-10-07 | |
US60/416,684 | 2002-10-07 | ||
US43133502P | 2002-12-05 | 2002-12-05 | |
US60/431,355 | 2002-12-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004033827A2 true WO2004033827A2 (en) | 2004-04-22 |
WO2004033827A3 WO2004033827A3 (en) | 2006-01-12 |
Family
ID=42602338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/031608 WO2004033827A2 (en) | 2002-10-07 | 2003-10-06 | Safety lock for lever-type door handles |
Country Status (3)
Country | Link |
---|---|
US (1) | US7416230B2 (en) |
AU (1) | AU2003282698A1 (en) |
WO (1) | WO2004033827A2 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8196973B2 (en) * | 2008-04-25 | 2012-06-12 | Craig Timothy D | Device for childproofing a door lock |
US8177268B2 (en) * | 2009-02-12 | 2012-05-15 | Cosco Management, Inc. | Lever-handle lock |
US20110112689A1 (en) * | 2009-11-06 | 2011-05-12 | Gm Global Technology Operations, Inc. | Egress latch |
US8458857B1 (en) | 2012-01-26 | 2013-06-11 | ADCO Industries—Technologies, L.P. | Blocking closure of a passageway |
US20140175814A1 (en) * | 2012-12-21 | 2014-06-26 | Holsopple Security Solutions LLC | Security door block |
US9534703B2 (en) | 2014-02-18 | 2017-01-03 | Larry Holmes | Sink and shower handle restraint |
US9752350B2 (en) | 2014-12-12 | 2017-09-05 | Raymond E Davis | Hand and finger protector for use with doors |
US9328546B1 (en) | 2015-02-21 | 2016-05-03 | Raymond E Davis | Hand and finger protector for use with doors |
US9181749B1 (en) | 2015-03-05 | 2015-11-10 | Raymond E Davis | Deformable hinge gap blocker for the protection of hands and fingers |
US11203884B2 (en) * | 2017-09-14 | 2021-12-21 | Elbee Pty Ltd. | Door handle lock |
US11371272B2 (en) | 2020-06-19 | 2022-06-28 | Becky Berenika Pesacov | Portable door lock |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2463195A (en) * | 1946-07-11 | 1949-03-01 | Paul F Mungan | Locking device |
US4605251A (en) * | 1984-07-23 | 1986-08-12 | Finlay John R | Door lock |
US4715200A (en) * | 1987-02-18 | 1987-12-29 | James Katsaros | Locking device for a door lock |
US5035128A (en) * | 1990-09-20 | 1991-07-30 | Ridgway David R | Anti-rotation lock apparatus for inside deadbolt locks |
US5052202A (en) * | 1990-03-21 | 1991-10-01 | Murphy Jerry A | Dead bolt locking device |
US5718133A (en) * | 1995-12-07 | 1998-02-17 | All Ship Enterprise Co., Ltd. | Auto steering wheel lock |
US6301941B1 (en) * | 2000-01-21 | 2001-10-16 | Morgan L. Nicholsfigueiredo | Dead-bolt locking device |
US6360568B1 (en) * | 2001-05-11 | 2002-03-26 | Tian-Yuan Chen | Automobile steering lock |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4196602A (en) * | 1978-05-15 | 1980-04-08 | Elkem-Spigerverket A/S | Locking latch handle for windows, doors, and the like |
GB2088463A (en) * | 1980-08-26 | 1982-06-09 | May Patrick James | A child safety device for a closure securing member |
US4798069A (en) * | 1988-01-19 | 1989-01-17 | Deforrest William Sr | Protecting device for lever handle door locks |
US4899564A (en) * | 1988-06-03 | 1990-02-13 | Gilbert Leamon A | Doorknob security device |
US5987230A (en) * | 1995-06-28 | 1999-11-16 | Canon Kabushiki Kaisha | Output device, information processing apparatus, memory control method and memory medium |
US5791174A (en) * | 1996-06-06 | 1998-08-11 | Fitzgerald; Marlon R. | Paddle handle locks |
US7048315B2 (en) * | 2003-06-17 | 2006-05-23 | Cosco Management, Inc. | Lock for lever-handled door latch |
US6929292B1 (en) * | 2004-01-09 | 2005-08-16 | Mauricio Galindo | Lever lock system |
US7334824B2 (en) * | 2004-10-12 | 2008-02-26 | Kidco, Inc. | Door lever lock |
-
2003
- 2003-10-06 WO PCT/US2003/031608 patent/WO2004033827A2/en not_active Application Discontinuation
- 2003-10-06 AU AU2003282698A patent/AU2003282698A1/en not_active Abandoned
- 2003-10-06 US US10/530,635 patent/US7416230B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2463195A (en) * | 1946-07-11 | 1949-03-01 | Paul F Mungan | Locking device |
US4605251A (en) * | 1984-07-23 | 1986-08-12 | Finlay John R | Door lock |
US4715200A (en) * | 1987-02-18 | 1987-12-29 | James Katsaros | Locking device for a door lock |
US5052202A (en) * | 1990-03-21 | 1991-10-01 | Murphy Jerry A | Dead bolt locking device |
US5035128A (en) * | 1990-09-20 | 1991-07-30 | Ridgway David R | Anti-rotation lock apparatus for inside deadbolt locks |
US5718133A (en) * | 1995-12-07 | 1998-02-17 | All Ship Enterprise Co., Ltd. | Auto steering wheel lock |
US6301941B1 (en) * | 2000-01-21 | 2001-10-16 | Morgan L. Nicholsfigueiredo | Dead-bolt locking device |
US6360568B1 (en) * | 2001-05-11 | 2002-03-26 | Tian-Yuan Chen | Automobile steering lock |
Also Published As
Publication number | Publication date |
---|---|
US7416230B2 (en) | 2008-08-26 |
AU2003282698A1 (en) | 2004-05-04 |
AU2003282698A8 (en) | 2004-05-04 |
US20060170226A1 (en) | 2006-08-03 |
WO2004033827A3 (en) | 2006-01-12 |
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